Abstract: Discourse identity is the concentrated embodiment of the subject discourse and identity of ideological and political teachers in colleges and universities,and it is an important issue in the construction of ideological and political teachers in colleges and universities in the new era.The internal stipulation and external interpretation of the subject of discourse identity,the macro-dominance and micro-participation of the structure,and the positioning of individual independence and group ownership provide a theoretical basis for the formation of the discourse identity.The construction of the discourse identity depends on the collective power of the functions of knowledge dissemination and value orientation,resource regulation and inspiration education,code of conduct and ethical evaluation,etc.It also needs to be supported by the presupposition strategy of "vanguard",the prominence strategy of "magnifying glass",the empathy strategy of "insider" and the evaluation strategy of "microscope".

Key words: new era, ideological and political teachers in colleges and universities, discourse identity